Push-pin



A. PAVELKA Oct. 1, 1930.

PUSH PIN Filed lay 2'7, 192$ l 40 fiedform of thepush-pin.

Patented Oct. 7, 1930 UNITED TATES PATENT.- CE

AN'roN. ,PAVELKA, OEBEBWYN, rumors Applieationlfiled. May 27, 1929. sameNo. 356,172. 7

i The principal object of the present inven tion is to provide animproved push-pin.

Another object oftlie present invention is the provision of a push-pinWhich may be formed by stamping a blank and thereupon suitablybendingthe same to form a push-pin.

A still further object of the present inventionis the-provision of apushQpin Whichmay be formed out of a stamped blank and Whioh 1:0may-have a disk, driving end and ahead.

I Astill further object ofthe present inventionis the provision of amethod for making a push-pin by suitably forming a [blank stamped out ofa sheet of metal;

-With the above general objects in view and others that Willappearas'the nature of the invention is better understood the same 0011-sistsin the novel construction, combination and arrangement of partshereinafter: more fully described, illustratedlin the'accornpanyingdrawing and pointed out in the appended claims." Y In the drawingforming a partof this ap} plicatiomand in Which like designatingehan'2"5 acters refer to corresponding parts through outvthe several views,

Fig. 1 is an elevation'al view, of stamped its 'beingi'ormed into apush-pin;

7 Fig. 2 illustrates one of the steps in making "Fig. {t isacross-sectional view th rough the pushapinor'horizontal plane on lineof Fig. 5 is a blankior a modified form ofthe pusl1-pin;and' Fig. dis asideelevationalview ofthe modidravving there is shown on Fig. 1 ablankstamped outofa sheet of metal, including disk 10, from Which'steni 11radially projects Said blank furtherin- T Referring to the present 5eludes a flat head 12=vvhieli is made'at" the blankout of asheet ofmetal preparatory to.

outer end of said stem 11. Projecting from said head 12 at: apointvvhich is diametrically opposite from the point Where said stem 11joins said head 12, is'a taperingprong lii,said prong 13 beingsubstantially twice as long as saidsten ll. Said stem 11 begins atthecenter of said disk 10 and is integrally formed therewith, its innere'ndbeing separated from said disk 10 by incisions 14 on lines which arecontinuations ofthe edge linesjat the free body portion of said stem 11.

Longitudinallyand centrallv said stem 11 and pronglS are angularl y'bent,;so"that in: cross-section on transverse plane thereof the sameill have a V-shaped forniationasseen on Fig' 4, Th'isis for the-purposeof strength eningthe push-pin, imparting a body thereto and giving itarounded appearance. l

When thejblank shown on Figll has been 7 completed in accordance withtli eaforesaid (:5 description, said stem ll, head 12 and prong 18 areraised until thesame assume position substantially at a right angle tothe body of disk 10, ,as indicated by dotted lines on Fig, 2. "Said'stem11, head 12; and prongl3 rnay be bent slightly further so astoimpjart tosaid stem 11 slightly curved or flaring out position. When saidystem 11head lland prong 13Ywill bebrought t0 the position i'n dicated by dottedlineon' Fig. 2 or in other is Words when the-same will remainiatsubstamtiall y riglit angle to the" plane of thedisk 10, thereivilllresultarecess or slot'l5 disk 10, bordered by edges made by the incisionlines'jll'. l l '80 1 :Thereupon head 12 and prongy13 are bent atpointof junetiire' of stern ll yvith head 12, until said head assumes asubstantially rig-ha 1' angled relation. With respeot of I stein 11, orV v until said head 12 shall remain substantially.

in parallelrelation-With disklO.

Thereupon prong1 3 is-bent doWnvv-ardly,

at a point of junotui'e thereof with saidihead 12', as seen 011: Fig:'2, and thereupon? said prong 13is brought Within slot 15 andclose to lto the lower or inner end of said stem 11, the position illustrated inFig. 3. Said prong while in that latter position may be slightly curvedoppositely to the curvature of said stem 11 so that the push-pin maypresent a neat and symmetrical appearance as clearly seen on Fig. 3.

WVhen said prong 13 is in its operative po sition shown on Fig. 3,thereupon pressure is exerted at the periphery of disk 10 adjacent theouter termination of slot for bringing the two points resulting fromsaid slot 15 and the periphery edge in contact, as seen on Fig. 3, byvirtue of which operation slot 15 will assume a triangular formation.

By this means disk 10 w1ll assume a neat and uniform appearance and itsperiphery will become smooth, and at the same time prong 13 will beclinched within said slot 15 and will be held in position within disk10. i

The modified form of the invention illustrated on Figs. 5 and 6 includesthe identical disk 10 and head 12, but stem 11 is not tapered, but is ofrectangular formation. Also prong 13 has a perpendicular form. The outerend of prong 13 is reduced and downwardly tapered, affecting shoulders16, which, when the blank is formed into a push pin will be adapted torest upon the edges of disk 10 adjacent slot 15, as clearly seen on Fig.6. In the modified form of the in vention stem 11 and prong 13 are alsolongitudinally and centrally bent or ribbed for strengthening the same.

The advantage in providing shoulder 16 in the modified form of theinvention resides in the fact that should the push-pin be driven intothe wall by employment of a hammer, applying the strokes thereof at head12, said shoulders 16 bearing against the flange 10 will hold prong 13in position and will prevent said prong 18 to make any shifting movementwith respect to disk 10.

It is to be understood that the push-pin hereinabove described whendriven into a wall should be driven until disk 10 will remain in contactwith the wall. Thus head 12, stem 11 and portion of prong 18 or 13adjacent head 12 will provide means for hanging thereupon the desiredobject.

Said stem 11 as well as portion of prong 13 remaining above disk 10 maybe bent towards each other to the position indicated by dotted lines onFig. 3, which operation will more clearly define head 12 and at the sametime will prevent said stem 11 and portion of said prong 13 aforesaidfrom bending outwardly when pressure is applied at head 12 for drivingthe push-pin into the wall.

vWhile there is described herein a preferred embodiment of the presentinvention it is nevertheless to be understood that minor changes may bemade therein without departing from the spirit and scope of the invention as claimed.

What I claim as new is:

1. A push pin comprising a disk, a stem integrally formed with thecentral portion of said disk, a head integrally formed with said stemand being in an angular position with respect to said stem, and a prongintegrally formed with said head and angularly disposed with respectthereto, said disk having a radial slot through which the opposite freeend of said prong is adapted to project.

2. A push-pin comprising a disk, a head, said disk and said head beingsubstantially in parallel relation, a stem integrally formed with andconnecting with said disk and said head, and a prong integrally formedwith said head,said disk having a radial slot within which said prong ispositioned, the other free end of said prong extending beyond the otherside ofsaid disk.

3. A push-pin comprising a disk, a head, said disk being insubstantially parallel relative position to said head, a stem integrallyformed with said disk and projecting therefrom from its central portion,the other end of said stem integrally connecting with the edge of saidhead, and a prong integrally formed with said head and projecting fromthe edge thereof, said prong passing through a recess made in said disk.

4. A push-pin comprising a disk, a head, a stem connecting with saidhead and said disk, and a prong, said disk having a slot whichacconnnodates said prong therewithin, said prong being reduced in widthto form shoulders, said shoulders being adapted to rest upon the edgesin said disk adjacent said slot.

5. A method of making a push-pin, comprising stamping a blank out of asheet of metal, said blank including a disk, a stem, at head, and aprong, making incisions in said disk along the lines which arecontinuations of the edges of said stem, said incisions reachingsubstantially to the central portion of aid disk, bending said stem atthe point at which the same joins with said disk until the same shall beat substantially right angle with respect to the disk, thereupon bendingsaid head until the same remains in parallel relation with said disk,and thereupon bending said prong perpendicularly to said disk andpassing the same through the slot resulting from said incisions.

6. A push-pin comprising a disk, a head, said disk being insubstantially parallel relative position to said head, a stem integrallyformed with said disk and projecting substantially from the centralportion thereof, the other end of said stem integrally connecting withthe edge of said head, and a prong integrally formed with said head andprojecting from a diametrically opposite point at the edge thereof, saiddisk being provided with alradial slot, said prong passing through saids 0t.

7 A push-pin comprising a disk, a head,

said disk being in substantially parallel relative position to saidhead, a stem integrally formed With said disk and projectingsubstantially from the central portion thereof, the 5 other end ofsaidstem integrally connecting With the edge of said head, and a prong inte-1 grally formed with said head and projecting from a diametricallyopposite point at the edge thereof, said disk eing provided with aradial slot extending from-the termination of said stem to the edge ofsaid disk, said prong passing through said slot and adjacent the lowerend of said stem; i

In testimony whereof I afiix my signature. i V f ANTON PAVELKA. V

